EF 70-300mm IS USM... and no amount of post processing could get rid of it.

Actually, it's not all that hard to get rid of, even if there isn't a slider for it in ACR.

Here's a quick-and-dirty two-minute proof-of-concept. Select => Color Range, use the resulting selection as a mask for a saturation adjustment layer. More refined solutions are left as an exercise for the reader....

Cheers,

b&

P.S. Also attached is my contribution to the theme, from many years ago.... b&